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分享一个Laravel好用的Cache宏

Jun 06, 2016 pm 08:08 PM
laravel

这篇文章主要介绍了分享一个Laravel好用的Cache宏的方法的相关资料,需要的朋友可以参考下

Laravel提供的缓存工具很好用,手册里介绍了一些基本的用法,比如get,put,forget,forever等,一开始我是像下面这样使用的:

复制代码 代码如下:


if (!$article = Cache::get('article_1')) {
    $article = Article::find(1);
    Cache::forever('article_1',$article);
}

这是最基本的用法,自动判断缓存是否存在,不存在则从数据库中取并写入缓存。

后来发现模型也自带remember 和 rememberForever方法,例如可以这样:

复制代码 代码如下:


$article = Article::rememberForever('article_1')->where('id','=',1);

这个有局限性,在复杂查询时并不能完全缓存数据,比如使用了with()预加载关联数据时就无法缓存关联数据。

然后发现Cache也可以像Response那样自定义宏方法,遂作如下尝试:

复制代码 代码如下:


//注册缓存存取宏
Cache::macro('want',function($key,$minutes=0,$callback){
    if (!$data = Cache::get($key)) {
        $data = call_user_func($callback);
        if ($minutes == 0) {
            Cache::forever($key,$data);
        } else {
            Cache::put($key,$data,$minutes);
        }
    }
    return $data;
});

这个方法可以放在bootstrap/start.php里,也可以放在filter中的App::before()中,随自己项目方便吧,,看下如何使用的:

复制代码 代码如下:


$id = Input::get('id');
$article = Cache::want('article_'.$id,0,function() use ($id){
    return Article::with('tags')->findOrFail($id,['id','cid','title','content_html as content','created_at','updated_at']);
});

个人挺喜欢这种写法的。希望大家能够喜欢本文内容。

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